improved quickstart:

* respective default answers will be written to config if user provided
   no answer
 * added tests for quickstart

blag/blag.py

@@ -17,6 +17,7 @@ import feedgenerator
 from blag.markdown import markdown_factory, convert_markdown
 from blag.devserver import serve
 from blag.version import __VERSION__
+from blag.quickstart import quickstart
 
 logger = logging.getLogger(__name__)
 logging.basicConfig(
@@ -425,33 +426,5 @@ def generate_tags(articles, tags_template, tag_template, output_dir):
             fh.write(result)
 
 
-def quickstart(args):
-    """Quickstart.
-
-    This method asks the user some questions and generates a
-    configuration file that is needed in order to run blag.
-
-    Parameters
-    ----------
-    args : argparse.Namespace
-
-    """
-    base_url = input("Hostname (and path) to the root? "
-                     "[https://example.com/]: ")
-    title = input("Title of your website? ")
-    description = input("Description of your website [John Doe's Blog]? ")
-    author = input("Author of your website [John Doe]? ")
-
-    config = configparser.ConfigParser()
-    config['main'] = {
-            'base_url': base_url,
-            'title': title,
-            'description': description,
-            'author': author,
-    }
-    with open('config.ini', 'w') as fh:
-        config.write(fh)
-
-
 if __name__ == '__main__':
     main()

blag/quickstart.py

@@ -0,0 +1,68 @@
+"""Helper methods for blag's quickstart command.
+
+"""
+
+import configparser
+
+
+def get_input(question, default):
+    """Prompt for user input.
+
+    This is a wrapper around the input-builtin. It will show the default answer
+    in the prompt and -- if no answer was given -- use the default.
+
+    Parameters
+    ----------
+    question : str
+        the question the user is presented
+    default : str
+        the default value that will be used if no answer was given
+
+    Returns
+    -------
+    str
+
+    """
+    reply = input(f"{question} [{default}]: ")
+    if not reply:
+        reply = default
+    return reply
+
+
+def quickstart(args):
+    """Quickstart.
+
+    This method asks the user some questions and generates a
+    configuration file that is needed in order to run blag.
+
+    Parameters
+    ----------
+    args : argparse.Namespace
+
+    """
+    base_url = get_input(
+        "Hostname (and path) to the root?",
+        "https://example.com/",
+    )
+    title = get_input(
+        "Title of your website?",
+        "My little blog",
+    )
+    description = get_input(
+        "Description of your website?",
+        "John Doe's Blog",
+    )
+    author = get_input(
+        "Author of your website",
+        "John Doe",
+    )
+
+    config = configparser.ConfigParser()
+    config['main'] = {
+            'base_url': base_url,
+            'title': title,
+            'description': description,
+            'author': author,
+    }
+    with open('config.ini', 'w') as fh:
+        config.write(fh)